If you eat too many snacks, you won’t eat any dinner! That’s not good!
If you fill up on snacks, you won’t eat any dinner! That’s not good!
この文章が以下のように翻訳で決ます。
オヤツを食べ過ぎると夕飯が食べられなくなるからダメなの ー If you eat too many snacks, you won’t eat any dinner! That’s not good!
オヤツを ー Snacks / sweets
食べ過ぎる ー eat too many / fill up on
と ー if
夕飯が ー dinner
食べられなくなるから ー you won’t be able to eat / you won’t fit any (dinner) in
ダメなの ー that’s not good / so stop it!
参考になれば嬉しいです。
If I let you eat too many snacks, you'll get full and you won't eat as much dinner as you should, so no snacks for you now.
この場合、次のような言い方ができますよ。
ーIf I let you eat too many snacks, you'll get full and you won't eat as much dinner as you should, so no snacks for you now.
「おやつたくさん食べたら、お腹いっぱいになって晩ごはんを食べなくなるから、今はおやつはダメ」
ご参考まで!